Predators Cats: Although cats are usually the go-to animal for mice hunting, they are generally less effective than most people assume. Usually the mice hide in places that a cat cannot reach and although the catâs odor is supposed to scare mice, it can eventually attract mice once they get used to the smell.
They can also act as pest and disease carriers, transporting additional problems such as fleas or ringworm. Thankfully, if you find mice digging holes in your yard, you have several solutions â physical, cultural and chemical â to remedy the problem. Mice populations in gardens and yards can quickly be controlled using the simple snap-style mouse trap sold in most home and hardware stores.
Holes tend to be 2-3 inches wide and smooth from repeated use. Rats are secretive and rarely seen during the day. If you see them during daylight hours, it means you have a lot of rats on the premises. Drawing of their burrow system can be seen below. Photo at right shows a Norwary rat hole. Note the 6 ruler above.